Cathedral

A cathedral is a Christian church that contains the seat of a bishop. I expect most people already were aware of that but it is the origin of the name that interested me. It is from the Latin cathedra which was a teacher's seat.
A cathedral is a religious building for worship, specifically of a denomination with an episcopal hierarchy, such as the Roman Catholic, Anglican, Orthodox, and some Lutheran and Methodist churches, which serves as a bishop's seat, and thus as the central church of a diocese, conference, or episcopate.